From patchwork Thu Nov 15 10:08:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 10684117 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F19E513BF for ; Thu, 15 Nov 2018 10:45:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6DDE2C02E for ; Thu, 15 Nov 2018 10:45:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB2A42C03B; Thu, 15 Nov 2018 10:45:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id AF44B2C02E for ; Thu, 15 Nov 2018 10:45:23 +0000 (UTC) Received: from localhost ([::1]:37988 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNF9G-0007RN-Ve for patchwork-qemu-devel@patchwork.kernel.org; Thu, 15 Nov 2018 05:45:23 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57652) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNF5I-0003nF-Kz for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gNF5H-0000tw-JP for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:16 -0500 Received: from mga03.intel.com ([134.134.136.65]:14567) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gNF5H-0000oM-AE for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:15 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Nov 2018 02:41:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,236,1539673200"; d="scan'208";a="106467299" Received: from devel-ww.sh.intel.com ([10.239.48.119]) by fmsmga004.fm.intel.com with ESMTP; 15 Nov 2018 02:41:13 -0800 From: Wei Wang To: qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com Date: Thu, 15 Nov 2018 18:08:02 +0800 Message-Id: <1542276484-25508-7-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1542276484-25508-1-git-send-email-wei.w.wang@intel.com> References: <1542276484-25508-1-git-send-email-wei.w.wang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.65 Subject: [Qemu-devel] [PATCH v9 6/8] migration/ram.c: add a function to disable the bulk stage X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liliang.opensource@gmail.com, peterx@redhat.com, wei.w.wang@intel.com, pbonzini@redhat.com, nilal@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds a function to enable a precopy notifier callback outside the migration subsystem to disable the bulk stage flag. This is needed by the free page optimization offered by virtio-balloon. Signed-off-by: Wei Wang CC: Dr. David Alan Gilbert CC: Juan Quintela CC: Michael S. Tsirkin CC: Peter Xu --- include/migration/misc.h | 1 + migration/ram.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/include/migration/misc.h b/include/migration/misc.h index 0bac623..67cb275 100644 --- a/include/migration/misc.h +++ b/include/migration/misc.h @@ -30,6 +30,7 @@ typedef enum PrecopyNotifyReason { void precopy_infrastructure_init(void); void precopy_add_notifier(Notifier *n); void precopy_remove_notifier(Notifier *n); +void precopy_disable_bulk_stage(void); void ram_mig_init(void); void qemu_guest_free_page_hint(void *addr, size_t len); diff --git a/migration/ram.c b/migration/ram.c index 65b1223..8745ca3 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -352,6 +352,15 @@ static void precopy_notify(PrecopyNotifyReason reason) notifier_list_notify(&precopy_notifier_list, &reason); } +void precopy_disable_bulk_stage(void) +{ + if (!ram_state) { + return; + } + + ram_state->ram_bulk_stage = false; +} + uint64_t ram_bytes_remaining(void) { return ram_state ? (ram_state->migration_dirty_pages * TARGET_PAGE_SIZE) :